/Engine/Source/Runtime/AIModule/Public/HierarchicalHashGrid2D.h
Finds grid level where the bounds fit inside a cell.
Returns cell location of the item, or location at Level == INDEX_NONE if the item cannot fit in the grid.
[FCellLocation](API\Runtime\AIModule\THierarchicalHashGrid2D\FCellLocation) CalcCellLocation ( const FBox & Bounds ) const